Holographic wills are allowed in the State of California. However, the mental capacity and state of mind of Larry King will play a vital role as to whether or not his previous attorney-drafted estate plan will hold up.
Rumor has it that his estate is worth close to $100 million. More on this here: https://www.wealthmanagement.com/estate-planning/larry-king-s-handwritten-will-throws-estranged-wife-curveball
